There’s a lot of cool, free stuff in the catalog such as International fedoras, a jade necklace, a green hood, etc and all you have to do is just to set the price to free
But if you want more cool stuff then I suggest playing a game called Creator Challenge. There’s 3 of it and you can get free items like book wings, bat wing, Godzilla backpack, Rodan’s head, a cool vr glass and more
Creator Challenge is basically a quiz about making a game in roblox and in each game has three quiz sections. Each sections if you completed them will reward you with a free item as said above.
Another way is to complete roblox’s event.